Armature for dynamos



W. S. BELDING. ARMATURE FOR DYNAMOS, &c.

Patented July 29, 1890.

w d y 4 J m; 7 M M (No Model.) 4 Sheets-Sheet 2. W. S. BELDING.

ARMATURE FOR DYNAMOS, 6w.

Patented July 29, 1890 (N0 Mode l.) v 4 Sheets-Sheet 3. W. S. BELDING. ARMATURE FOR DYNAMOS, 8w.

Patented July 29, 1890.

(No Model.) 4 SheetsSheet 4.

W. S. BELDING.

ARMATURE FOR DYNAMOS, 650.

No. 433,891. Patented July 29,1890.

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UNITED STATES PATENT OFFICE.

\VA'RREN S. BELDING, OF ENGLEIVOOD, ILLINOIS.

ARMATURE FOR DYNAM'OS, etc.

SPECIFICATION forming part of Letters Patent No. 433,391, dated July 29, 1890.

Application filed July 5, 1889. Serial No. 316,521. (No model.)

To all whom it may concern.-

Be it known that I, WARREN S. BELDING, a citizen of the United States, residing at Englewood, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Armatures for Electric Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to the construction of armatures having insulation spiders, to a construction whereby the spiders are held at a suitable distance from the end of the armature-core to make room for the coils of wire, to a construction. whereby the armature is accurately balanced, to a construction whereby the Ventilation of the armature is effected, and to certain details which will be hereinafter set forth.

In the accompanying drawings, Figure 1 is an end view of a portion of the partially-completed armature. of one-half of the partially-completed armature. Fig. 3 is a detached view of one of the coil-guards which are applied to the ends of the bobbin-spaces. Fig. at is an end view, the armature having an open spider. Fig. 5 is a similar view with a disk-form spider. Fig. 6 is a view of the inner side of a disk-form spider detached. Fig. 7 is a cross-section through the spider shown in Fig. 6. Fig. 8 is a detail sectional view along one end of the binding-bolt. Fig. 9 is a detail sectional view at one end of the balancing-plugs. Fig. 10 is a detached view of one of the plugs. Fig. 11 is a side view of the finished armature partially in section and partially in elevation.

The armature-core may be built up of a collection of metallic plates placed side by side, or, for the purposes of a portion of the improvements herein shown, it may be a solid mass. The drawings show said armaturecore composed of a number of plates a, and the entire core is composed of two interlocking sections A A, so that said plates a constitute each a half-circle. Said plates are best made of sheet metal by means of dies,

Fig. 2 is a perspective view to receive the exterior portion of the coils B.

All the plates a may be separated from each other by means of some suitable insulating material. Bolts A may extend longitudinally through some of the poles A formed by the polar extensions a, and the thimble a placed around the extended ends of said bolts. In building up the section A pieces of insulation or other material (6 may be placed between the plates a at intervals between the polar extensions through which the bolts A extend, so that between the poles penetrated by said bolts there will be transverse spaces from the exterior to the interior'of the armature for the passage of air, as hereinafter explained.

O is a coil-guard placed at the end of each bobbin-space. It is composed of a body 0, lobes O 0 and one or more tongues 0 Said tongues C are pushed longitudinally into the space between the polar extensions A and said lobes C are sufliciently far apart to extend the channelbetween said polar extensions outward over the end of the armaturecore, so that when the coil B is wound it is made full and perfect around said ends of the bobbin-spaces. The lobes are parallel to each other; hence in winding the coils upon the armature the adjacent lobes will be oblique to each other and will stand far enough apart to pass the thimbles a and said thimbles at one end of the armature are of about the same length as the distance the lobes extend outward from said core, while at the other end of said armature said thimblesare a littlelonger than the distance which said lobes and coils extend outward from the armature-core. Being thus provided with the coil-guards and being fully wound with coils, the aianature-sections are now ready to be joined to form the complete ring and to receive the spiders by which the ring is mounted upon the shaft. Any suitable mode of interlocking the sections may be adopted.

D D are the spiders, and E is the shaft. Each spider, when made in part of insulation material, is preferably made of two parts viz., a metallic hub D and an insulation part D The hub D is of suitable size to give the desired strength and bears a flange 01, or other outward exteirion or extensions, by means of which attachment is formed to the part D For this latter purpose screws 01 may be used. The part D of the spider extends outward from the center suflieiently far to receive the ends of the bolts A and rest against the outer ends of the thimbles a The nu'ts c0 are then fastened upon the ends of the bolts outside of the parts D to draw the latter tightly against the thimbles and thus firmly unite the entire spider with the ring of the armature. One of the spidersas, for example, the one at the left in liig. ll rests closely against the ends of the coils and against the coilguards, so that there is no space for the passage of air between said coils and said coil-guards, and so that by closing, in part at least, the spaces between said coil-guards but little air will pass between said spider and the adjacent end of the armature-ring. Since the lobes of adjacent coil-guards approach each other below, as shown in Fig. 1, the openings between said guards to the interior of the armature are small and may be closed by wax or similar material. Said spider is then opened around the hub, as shown in Fig. t, or has holes (1 around the hub, as in Fig. 5. The spider at the opposite end is, by reason of the longer thimbles, held away from the end of the armature-ring, so as to leave a space around said ring between the latter and the spider for the passage of air. There is then this passage for air, and also the passages formed at intervals between the plates of which the armature-core is composed. All these spaces or passages are farther from the axis of the armature than are the openings in the spider at the left of the armature. It follows, then, that when the armature is rotated rapidly centrifugal force will throw theair within the armature outward through these spaces which are most distant from the axis of the armature, and air will enter the openings in the spider at the left of the armature to till the partial vacuum created by the displacement of air thrown out of the other passages by centrifugal action. Thus a constant flow of air is established through the armature, whereby the latter is kept cool.

A commutator of any suitable form is to be applied to the shaft E and the spider D at the right of Fig. 11, the wires 1) of the coils B being led through the spider D for connecting with the commutator.

Suitable bands F, Fig. 11, may be extended around the armature to aid in retaining the wire of the coils in place.

Vhen the armature is completed in other respects, I determine whether it is balanced. This I do by placing the ends of the shaft thereof upon knife edges or some other bearings of low frictional resistance which are horizontally in line. If I find that one side of the armature is sufficiently heavier than its opposite side to cause said heavy .eaeei.

side to turn the entire armature, I secure one or more balancing-blocks G between the lobes C C on the light side of the armature in Order to make the two sides of the armature of equal weight. Said balancing-blocks may be secured by extending a screw G through the spider D into said balancing-blocks, orotherwise.

I claim as my in vention- 1. in an armature, the combii'iation of the armature-ring, the coil-guards C. composed of lobes C web G, and a tongue C applied to the ends of thearmature-ring between the polar extensions of the latter, the bolts A extending through said ring between said coilguards and beyond the latter, thimbles a surrounding the ends of said bolts, and spiders D, placed over said bolts and against said thimbles, and nuts or equivalent means for securing said spiders upon said bolts and against said thimbles, substantially as shown and described.

2. In an armature, the combination, with the armature-ring and its shaft, of bolts A extending through said ring between the coils l3, thimbles a applied over said bolts at one end of the armature, of a length equal to the thickness of said coils B, a spider applied to said shaft and extending over the bolts at that end of the armature-ring and bound by nuts or equivalent means against or close to said coils and against said thimbles and having openings around said shaft, and thimbles a applied to said bolts at the opposite end of the ring, of greater length than the thickness of said coils B, and a closed spider being applied to said thimbles upon said bolts by nuts or equivalent means, so that a space or spaces for the passage of air will be formed around the periphery of the armature-ring between the latter and said last-mentioned spider, substantially as shown and described.

3. In an armature,.the combination, with the armature-rin g and its shaft, of coil-guards applied between the poles of said ring, coils wound between said poles and within said coil-guards, and bolts A extending through said ring between the coils B and said coilguards, thimbles a applied over said bolts at one end of the armature, of a length equal to the thickness of said coils 1;, a spider applied to said shaft and extending over the bolts at that end of the armature-ring and bound by nuts or equivalent means against or close to said coils and against said thimbles and having openings around said shaft, and thimbles a applied to said bolts at the opposite end of the ring of greater length than the thickness of said coils B, and a closed spider being applied to said thimbles upon said bolts by nuts or equivalent means, so that a space or spaces for the passage of air will be formed around the periphery of the armature-ring between the latter and said last-1n entioned spide 3 substantially as shown and described.

4. In an armature the combination, with the armature-ring, of coil-guards O, composed of lobes 0 Web 0, and a tongue 0 applied to the ends of the armature-ring between the polar extensions of the latter, bolts A extending through said ring between some of said coil-guards, thimbles (1 applied around said bolts, and suitable spiders being applied over said bolts and against said thimbles, and nuts or equivalent means for securing said spiders to said bolts and against said thimbles, and balancing-blocks G, located between the lobes O of said coil-guards, substantially as shown and described.

5. In an armature, the combination, with the armature-rim g, of coil-guards G, composed of lobes 0 web 0, and a tongue C applied to the ends of the armature-ring between the polar extensions of the latter, bolts A extending through said ring between a portion of said coilguards, thimbles a applied around said bolts, and suitable spiders being applied over said bolts and against said thinlbles, and nuts or equivalent means for securing said spiders to said bolts and against said CYRUS KEHR, GEO. E. Foss, Jr. 

